The developer rolled out a new version of the app on Oct 1, 2019 and over 0,5M users downloaded and set up this application. Adverts are a part of Fongo. Samsung and LG users install this application quite often.
You are able to get the installer of Fongo 126.96.36.199 for free and take a look at users' reviews on Droid Informer. The app works fine on Android 4.0 and above.
From the users' point of view, the pluses of the app are a nice UI, its low cost, useful features, excellent performance, a screen freeze and great customer support. As users state, the obvious drawbacks of this application are billing issues, a huge battery drain and misleading advertising.